Semiconductor Physics, Quantum Electronics & Optoelectronics, 21 (4), P. 387-391 (2018).
DOI: https://doi.org/10.15407/spqeo21.04.387

Electrical and dielectrical properties of composites based on (Ag1–xCux)7GeS5I mixed crystals
V.Yu. Izai 1 , V.I. Studenyak1, *, A.I. Pogodin1, I.P. Studenyak1, M. Rajnak2, 3, J. Kurimsky3, M. Timko2, P. Kopcansky2

1, * Uzhhorod National University, Faculty of Physics, 3, Narodna Sq., 88000 Uzhhorod, Ukraine E-mail: studenyak@dr.com
2Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
3Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, 04200 Košice, Slovakia

Abstract. Polymer composites were prepared from (Ag 1–x Cu x ) 7 GeS 5 I mixed crystals grown using Bridgman–Stockbarger method. The impedance measurements were performed at room temperature in the frequency range 10 –3 –2·10 6 Hz. The frequency dependences of electrical conductivity and dielectric permittivity for composites based on (Ag 1–x Cu x ) 7 GeS 5 I mixed crystals were obtained. The Nyquist plots for (Ag 1–x Cu x ) 7 GeS 5 I-based composite has been analyzed. The influence of cation Ag→Cu substitution on electrical conductivity of composites based on (Ag 1–x Cu x ) 7 GeS 5 I mixed crystals has been studied.

Keywords: mixed crystals, composites, cation substitution, impedance measurements, electrical conductivity, dielectric permittivity

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